c:windows\system32\isp.dll error message

I must start off by admitting to being rather inept when it comes to fixing comp errors.
I ran an ad-aware check and fixed many problems but am left with the following :
some objects couldn't be removed windows\system32\isp.dll

I also get the following message on start up
rundll32.exe-Bad Image
The application or DLL CROGRA~1\COMMON~2\ADDRES~1\cnbabe.dll is not a valid windows image

any thoughts what to try next?
Thanks for any help
Nancy

 

See http://www.commonname.com/english/ug/toolbar/default.asp?idx=10#4 for the removal instructions of the CommonName Browser Agent

Or run some good spyware / trojan removal software. There is likely more than just this one.